/* ==========================================================================
   CONVIVIUM — Parallel Comparison Studio Stylesheet
   Synchronized Grid, Columns, Interlinear Cards, Diff Engine, Typography
   ========================================================================== */

/* ==========================================================================
   STUDIO TOOLBAR
   ========================================================================== */
.studio-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-md);
  box-shadow: var(--shadow-sm);
  flex-wrap: wrap;
}

.studio-title-block {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.studio-title-block .back-btn {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 0.3rem 0.6rem;
  border-radius: var(--radius-sm);
  background-color: var(--bg-secondary);
  transition: all var(--transition-fast);
}

.studio-title-block .back-btn:hover {
  color: var(--text-primary);
  background-color: var(--bg-surface-elevated);
}

.studio-work-title {
  font-family: var(--font-title);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.studio-work-author {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-style: italic;
  font-family: var(--font-serif-cormorant);
}

.studio-controls-group {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  flex-wrap: wrap;
}

.toggle-group {
  display: inline-flex;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2px;
}

.toggle-btn {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.3rem;
  transition: all var(--transition-fast);
}

.toggle-btn.active {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  font-weight: 600;
}

/* ==========================================================================
   PASSAGE NAVIGATOR BAR
   ========================================================================== */
.passage-nav-bar {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: 0.65rem var(--space-md);
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--accent-primary) 8%, var(--bg-secondary)) 0%,
    var(--bg-secondary) 60%,
    color-mix(in srgb, var(--color-gold, #c8a44a) 6%, var(--bg-secondary)) 100%
  );
  border-bottom: 1px solid var(--border-subtle);
  border-top: 1px solid color-mix(in srgb, var(--accent-primary) 12%, transparent);
  position: relative;
  z-index: 50;
  isolation: isolate;
}

.passage-nav-label {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-primary);
  white-space: nowrap;
  flex-shrink: 0;
  opacity: 0.85;
}

.passage-nav-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
  box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}

.passage-nav-arrow:hover:not(.disabled) {
  background-color: var(--accent-surface);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.passage-nav-arrow.disabled,
.passage-nav-arrow:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.passage-nav-count {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
  padding: 0.2rem 0.5rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  opacity: 0.8;
}

/* Passage nav dropdown */
.passage-nav-dropdown-wrap {
  position: relative;
  flex: 1;
  min-width: 0;
  max-width: 600px;
}

.passage-nav-current {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  width: 100%;
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid color-mix(in srgb, var(--accent-primary) 25%, var(--border-subtle));
  background: linear-gradient(135deg, var(--bg-surface) 0%, color-mix(in srgb, var(--accent-primary) 4%, var(--bg-surface)) 100%);
  color: var(--text-primary);
  font-family: var(--font-serif, Georgia, serif);
  font-size: 0.9rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.passage-nav-current:hover {
  border-color: var(--accent-primary);
  background-color: var(--accent-surface);
  color: var(--accent-primary);
}

.passage-nav-current-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.passage-nav-caret {
  font-size: 0.55rem;
  opacity: 0.55;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.passage-nav-current.open .passage-nav-caret {
  transform: rotate(180deg);
}

.passage-nav-menu {
  position: fixed;
  z-index: 9999;
  min-width: 320px;
  max-width: 480px;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg), 0 0 0 1px color-mix(in srgb, var(--accent-primary) 10%, transparent);
  padding: var(--space-xs);
  display: none;
  flex-direction: column;
  gap: 2px;
  max-height: 320px;
  overflow-y: auto;
  animation: fadeIn 0.12s ease-out;
}

.passage-nav-menu.open {
  display: flex;
}

.passage-nav-menu-item {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.55rem 0.7rem;
  border-radius: var(--radius-sm);
  background: none;
  border: none;
  font-family: inherit;
  font-size: 0.85rem;
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
  transition: background-color var(--transition-fast);
  width: 100%;
}

.passage-nav-menu-item:hover {
  background-color: var(--bg-secondary);
}

.passage-nav-menu-item.active {
  background-color: var(--accent-surface);
  color: var(--accent-primary);
  font-weight: 600;
}

.passage-nav-menu-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-muted);
  min-width: 16px;
  flex-shrink: 0;
}

.passage-nav-menu-title {
  flex: 1;
}

.passage-nav-menu-check {
  font-size: 0.75rem;
  color: var(--accent-primary);
  font-weight: 700;
}

/* ==========================================================================
   EDITIONS SELECTOR POPOVER & BAR
   ========================================================================== */
.editions-selector-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-md);
  margin-bottom: var(--space-md);
  position: relative;
  z-index: 30;
}

.edition-toggle-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.edition-toggle-chip:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
}

.edition-toggle-chip.active {
  background-color: var(--accent-surface);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  font-weight: 600;
}

.edition-toggle-chip .chip-check {
  font-size: 0.75rem;
  opacity: 0.7;
}

/* ── Add Edition Dropdown Menu ── */
.add-edition-dropdown {
  position: relative;
  display: inline-block;
}

.btn-add-edition {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 600;
  background-color: var(--bg-surface);
  border: 1.5px dashed var(--accent-primary);
  color: var(--accent-primary);
  white-space: nowrap;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-add-edition:hover {
  background-color: var(--accent-surface);
  border-style: solid;
}

.add-edition-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  z-index: 100;
  min-width: 280px;
  max-width: 360px;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-xs);
  display: none;
  flex-direction: column;
  gap: 2px;
  max-height: 380px;
  overflow-y: auto;
  animation: fadeIn 0.15s ease-out;
}

.add-edition-menu.open {
  display: flex;
}

.add-edition-menu-header {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 0.4rem 0.6rem 0.2rem;
  letter-spacing: 0.05em;
}

.edition-menu-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.45rem 0.6rem;
  border-radius: var(--radius-sm);
  background: none;
  border: none;
  font-family: inherit;
  font-size: 0.825rem;
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
  transition: background-color var(--transition-fast);
  width: 100%;
}

.edition-menu-item:hover {
  background-color: var(--bg-secondary);
}

.edition-menu-item.active {
  background-color: var(--accent-surface);
  color: var(--accent-primary);
  font-weight: 600;
}

.edition-menu-item-info {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.edition-menu-item-name {
  font-size: 0.85rem;
}

.edition-menu-item-meta {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.edition-menu-item-check {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-primary);
}

/* ==========================================================================
   PARALLEL COMPARISON STUDIO (Grid Engine)
   ========================================================================== */
.parallel-studio-container {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  /* overflow: clip keeps border-radius clipping without creating a scroll container,
     which would break position: sticky on the header row inside. */
  overflow: clip;
  display: flex;
  flex-direction: column;
}

.parallel-header-row {
  display: grid;
  background-color: var(--bg-secondary);
  border-bottom: 2px solid var(--border-strong);
  position: sticky;
  top: var(--nav-height);
  z-index: 20;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
}

.parallel-col-header {
  padding: var(--space-sm) var(--space-md);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  position: relative;
}

.parallel-col-header:last-child {
  border-right: none;
}

.parallel-col-header.source-header {
  background-color: var(--accent-surface);
  border-right: 2px solid var(--border-strong);
}

.col-header-title {
  font-family: var(--font-title);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.col-header-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  flex-wrap: wrap;
}

/* Row & Cell Layout */
.parallel-body {
  display: flex;
  flex-direction: column;
  divide-y: 1px solid var(--border-subtle);
}

.parallel-row {
  display: grid;
  border-bottom: 1px solid var(--border-subtle);
  transition: background-color var(--transition-fast);
  cursor: pointer;
  position: relative;
  /* Ensure scroll-to anchoring clears the sticky edition header + main nav */
  scroll-margin-top: calc(var(--nav-height) + 56px);
}

.parallel-row:hover,
.parallel-row.hovered-row {
  background-color: var(--bg-active-row) !important;
}

.parallel-row.selected-row {
  background-color: var(--bg-highlight) !important;
  border-left: 4px solid var(--accent-primary);
}

.parallel-row:first-child {
  border-top: none;
}

.parallel-cell {
  padding: var(--space-md) var(--space-md);
  border-right: 1px solid var(--border-subtle);
  font-family: var(--user-font-family);
  font-size: var(--user-font-size);
  line-height: var(--user-line-height);
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  position: relative;
}

.source-text,
.translation-line {
  font-family: var(--user-font-family);
  font-size: var(--user-font-size);
  line-height: var(--user-line-height);
  color: var(--text-primary);
}

.parallel-cell:last-child {
  border-right: none;
}

.parallel-cell.source-cell {
  background-color: var(--accent-surface);
  border-right: 2px solid var(--border-strong);
  font-feature-settings: "kern" 1, "liga" 1;
}

.line-meta-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  user-select: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2px;
}

.literal-gloss {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-style: italic;
  padding-top: 0.35rem;
  border-top: 1px dashed var(--border-subtle);
  line-height: 1.4;
}

.has-commentary-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  background-color: var(--color-gold);
  border-radius: 50%;
  margin-left: 4px;
}

/* Variance / Diff Highlights */
.diff-word {
  display: inline;
  border-radius: 3px;
  padding: 0 2px;
  transition: background-color var(--transition-fast);
}

.diff-shared {
  background-color: color-mix(in srgb, var(--accent-primary) 15%, transparent);
  color: var(--text-primary);
  border-bottom: 1.5px solid color-mix(in srgb, var(--accent-primary) 35%, transparent);
}

.diff-distinct {
  background-color: color-mix(in srgb, var(--color-terracotta, #b84a39) 12%, transparent);
  color: var(--text-primary);
  border-bottom: 1.5px dashed color-mix(in srgb, var(--color-terracotta, #b84a39) 45%, transparent);
}

.diff-word:hover {
  filter: brightness(0.95);
}

/* ==========================================================================
   INTERLINEAR / STACKED COMPARATIVE VIEW
   ========================================================================== */
.interlinear-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.interlinear-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.interlinear-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

.interlinear-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-lg);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
}

.interlinear-ref {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.interlinear-source-block {
  padding: var(--space-lg);
  background-color: var(--accent-surface);
  border-bottom: 1px solid var(--border-subtle);
}

.interlinear-source-text {
  font-family: var(--user-font-family);
  font-size: calc(var(--user-font-size) * 1.15);
  font-weight: 600;
  color: var(--text-primary);
  line-height: var(--user-line-height);
  margin-bottom: var(--space-xs);
}

.interlinear-translations-grid {
  display: flex;
  flex-direction: column;
  divide-y: 1px solid var(--border-subtle);
}

.interlinear-trans-item {
  padding: var(--space-md) var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  transition: background-color var(--transition-fast);
}

.interlinear-trans-item:hover {
  background-color: var(--bg-secondary);
}

.interlinear-trans-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.interlinear-trans-author {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.interlinear-trans-text {
  font-family: var(--user-font-family);
  font-size: var(--user-font-size);
  line-height: var(--user-line-height);
  color: var(--text-primary);
}

/* ==========================================================================
   DIFF & LEXICAL VARIANCE HIGHLIGHTING
   ========================================================================== */
.diff-word {
  display: inline;
  padding: 0 0.1rem;
  border-radius: 2px;
}

.diff-distinct {
  background-color: rgba(197, 155, 39, 0.22);
  color: inherit;
  border-bottom: 2px solid var(--color-gold);
}

.diff-shared {
  color: inherit;
}

/* ==========================================================================
   FONT CUSTOMIZATION CLASSES
   ========================================================================== */
.font-cormorant { font-family: var(--font-serif-cormorant); }
.font-garamond { font-family: var(--font-serif-garamond); }
.font-cardo { font-family: var(--font-serif-cardo); }
.font-system-serif { font-family: Georgia, 'Times New Roman', serif; }

/* Responsive adjustments */
.mobile-interlinear-hint {
  display: none;
  width: 100%;
  padding: 0.5rem 0.75rem;
  background-color: var(--accent-surface);
  border: 1px solid var(--accent-primary);
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  color: var(--text-primary);
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.mobile-hint-link {
  font-weight: 700;
  color: var(--accent-primary);
  text-decoration: underline;
  white-space: nowrap;
}

@media (max-width: 900px) {
  .mobile-interlinear-hint {
    display: flex;
  }
  
  .studio-toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-sm);
  }

  .studio-title-block {
    flex-wrap: wrap;
  }

  .studio-controls-group {
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .parallel-studio-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  
  .parallel-header-row,
  .parallel-row {
    min-width: 600px;
  }
}

@media (max-width: 600px) {
  .parallel-header-row,
  .parallel-row {
    min-width: 520px;
  }

  .parallel-cell {
    padding: var(--space-sm) var(--space-xs);
    font-size: 0.95rem;
  }

  .col-header-title {
    font-size: 0.85rem;
  }

  .editions-selector-bar {
    padding: var(--space-xs) 0;
    gap: var(--space-xs);
  }

  .edition-toggle-chip {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
  }
}

/* ==========================================================================
   TRANSLATION ARENA
   ========================================================================== */
.arena-shell {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  padding-bottom: 3rem;
}

/* ── Arena Header ── */
.arena-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-lg);
  flex-wrap: wrap;
  padding: var(--space-xl) 0 var(--space-md);
  border-bottom: 2px solid var(--border-subtle);
}

.arena-title {
  font-family: var(--font-title);
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.arena-subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin: 0.35rem 0 0;
  font-style: italic;
}

.arena-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.arena-select {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background-color: var(--bg-surface);
  color: var(--text-primary);
  cursor: pointer;
  transition: border-color var(--transition-fast);
  max-width: 200px;
}
.arena-select:focus {
  outline: none;
  border-color: var(--accent-primary);
}

/* ── Context Strip ── */
.arena-context-strip {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  flex-wrap: wrap;
}

.arena-work-badge {
  font-family: var(--font-title);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.arena-ref-badge {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.2rem 0.5rem;
}

.arena-source-text {
  font-size: 1rem;
  color: var(--text-secondary);
  font-style: italic;
  letter-spacing: 0.01em;
}

/* ── Battle Grid ── */
.arena-battle-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-md);
  align-items: stretch;
}

@media (max-width: 768px) {
  .arena-battle-grid {
    grid-template-columns: 1fr;
  }
  .arena-vs-divider {
    transform: rotate(90deg);
    margin: 0 auto;
  }
}

/* ── Metrical Scansion & Apparatus Criticus Enhancements ── */

.inline-scansion-line {
  font-family: var(--font-mono, "Courier New", monospace);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--accent-primary);
  opacity: 0.85;
  margin-bottom: 0.3rem;
  user-select: none;
}

.variant-tag {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  background-color: rgba(184, 134, 11, 0.15);
  border: 1px solid var(--accent-gold);
  color: var(--accent-gold);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.1rem 0.35rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.variant-tag:hover {
  background-color: var(--accent-gold);
  color: #fff;
}

.scansion-foot {
  display: inline-block;
  padding: 0 0.15rem;
}

.scansion-divider {
  color: var(--text-muted);
  margin: 0 0.2rem;
  opacity: 0.6;
}

.scansion-caesura {
  color: var(--accent-gold);
  font-weight: bold;
  margin: 0 0.3rem;
}

.word-cloud-tag:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ── Arena Card ── */
.arena-card {
  background-color: var(--bg-surface);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.18s;
  cursor: default;
}

.arena-card:not(.winner-card):not(.loser-card):hover {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-primary) 14%, transparent);
  transform: translateY(-2px);
}

.arena-card.winner-card {
  border-color: var(--color-gold, #c8a44a);
  background: color-mix(in srgb, var(--color-gold, #c8a44a) 8%, var(--bg-surface));
  box-shadow: 0 4px 18px color-mix(in srgb, var(--color-gold, #c8a44a) 25%, transparent);
  transform: translateY(-3px);
}

.arena-card.loser-card {
  opacity: 0.62;
  border-color: var(--border-subtle);
}

.arena-card-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.arena-anon-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.2rem 0.55rem;
  color: var(--text-muted);
}

.arena-translator-reveal {
  color: var(--accent-primary);
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: none;
  letter-spacing: 0;
}

.arena-passage {
  font-family: var(--font-title);
  font-size: 1.25rem;
  line-height: 1.75;
  color: var(--text-primary);
  border-left: 3px solid var(--border-subtle);
  padding-left: var(--space-md);
  margin: 0;
  font-style: italic;
  flex: 1;
}

.winner-card .arena-passage {
  border-left-color: var(--color-gold, #c8a44a);
}

.arena-vote-btn {
  align-self: flex-end;
  background-color: var(--accent-primary);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  padding: 0.6rem 1.4rem;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s;
  letter-spacing: 0.02em;
}

.arena-vote-btn:hover {
  background-color: var(--accent-secondary, var(--accent-primary));
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.arena-result-chip {
  align-self: flex-end;
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 700;
}

.arena-result-chip.chip-win {
  background-color: color-mix(in srgb, var(--color-gold, #c8a44a) 18%, transparent);
  color: var(--color-gold, #c8a44a);
  border: 1px solid var(--color-gold, #c8a44a);
}

.arena-result-chip.chip-lose {
  background-color: var(--bg-secondary);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
}

/* ── VS Divider ── */
.arena-vs-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
}

.arena-vs-label {
  font-family: var(--font-title);
  font-size: 1.2rem;
  font-weight: 900;
  color: var(--text-muted);
  background-color: var(--bg-secondary);
  border: 2px solid var(--border-subtle);
  border-radius: 50%;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

/* ── Result Banner ── */
.arena-result {
  display: flex;
  justify-content: center;
  animation: fadeSlideIn 0.3s ease;
}

.arena-result-banner {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-lg) var(--space-xl);
  background: color-mix(in srgb, var(--color-gold, #c8a44a) 10%, var(--bg-surface));
  border: 2px solid var(--color-gold, #c8a44a);
  border-radius: var(--radius-xl);
  max-width: 680px;
  width: 100%;
}

.result-icon {
  font-size: 2.5rem;
  line-height: 1;
}

.result-winner-name {
  font-family: var(--font-title);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.result-elo-change {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ── Leaderboard ── */
.arena-leaderboard-section {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
}

.arena-leaderboard-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: var(--space-md);
}

.arena-leaderboard-title {
  font-family: var(--font-title);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 0;
}

.arena-leaderboard-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.arena-lb-row {
  display: grid;
  grid-template-columns: 2rem 1fr auto auto;
  gap: var(--space-md);
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  border: 1px solid transparent;
  transition: background-color 0.15s;
}

.arena-lb-row.rank-1 {
  background: color-mix(in srgb, var(--color-gold, #c8a44a) 12%, var(--bg-secondary));
  border-color: color-mix(in srgb, var(--color-gold, #c8a44a) 40%, transparent);
}

.arena-lb-row.rank-2 {
  background: color-mix(in srgb, #adb5bd 10%, var(--bg-secondary));
}

.arena-lb-row.rank-3 {
  background: color-mix(in srgb, #cd7f32 10%, var(--bg-secondary));
}

.rank-badge {
  font-size: 1.15rem;
  text-align: center;
}

.lb-ed-info {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.lb-ed-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.lb-ed-year {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.lb-stats {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.1rem;
}

.lb-elo {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.lb-wl {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.lb-bar-wrap {
  width: 80px;
  height: 6px;
  background-color: var(--border-subtle);
  border-radius: 99px;
  overflow: hidden;
}

.lb-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--color-gold, #c8a44a));
  border-radius: 99px;
  transition: width 0.4s ease;
}

.arena-empty-lb {
  text-align: center;
  color: var(--text-muted);
  font-style: italic;
  padding: 2rem 0;
  font-size: 0.95rem;
}

/* ==========================================================================
   INTERACTIVE LEXICON WORD POPOVER
   ========================================================================== */
.lexicon-word {
  cursor: pointer;
  border-bottom: 1.5px dotted var(--color-gold);
  border-radius: 2px;
  transition: all var(--transition-fast);
  display: inline;
}

.lexicon-word:hover {
  background-color: var(--bg-highlight);
  color: var(--accent-primary);
  border-bottom: 1.5px solid var(--accent-primary);
}

.lexicon-popover {
  position: absolute;
  z-index: 1000;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-md);
  max-width: 280px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  line-height: 1.4;
  color: var(--text-primary);
  animation: fadeIn 0.15s ease-out;
}

.lexicon-popover-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.35rem;
}

.lexicon-popover-word {
  font-family: var(--font-serif-cormorant);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.lexicon-popover-lemma {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.lexicon-popover-meaning {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.lexicon-popover-link {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-primary);
  text-decoration: underline;
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}